🏷️ Basic Information

Make:

Yamaha

Model:

TTR125 / TT-R125E / TT-R125LWE

Vehicle Type:

Off-Road Motorcycle / Trail Bike

Engine Type:

Single Cylinder, Forward Inclined, 4-Stroke, Air-Cooled, SOHC

Engine Displacement:

124 cc

👋 Introduction

Market Position:

The Yamaha TTR125 series is positioned as an entry-level to intermediate trail bike, popular for recreational riding, youth motocross, and general off-road exploration. It balances user-friendliness with capable performance for its class.

Competitive Analysis:

Competes with similar displacement trail bikes from manufacturers like Honda (CRF125F), Kawasaki (KLX125), and Suzuki (DR-Z125), offering a reliable and accessible platform for learning and enjoyment.

Key Features:

User-friendly 4-stroke engine, electric start (E & LWE models), adjustable suspension, durable chassis, and Yamaha's reputation for reliability. The included parts catalog is a significant value add for maintenance and repair.

📋 Manual Details

Manual Type:

Workshop Service Repair Manual with Parts Catalogue

Language:

English

Format:

Digital (assumed PDF based on typical sales)

Coverage Areas:

Comprehensive coverage for TTR125, TT-R125E, TT-R125LWE models. Includes detailed sections on engine, chassis, electrical systems, maintenance, troubleshooting, and parts catalog.

Model Years Covered:

Typically covers a broad range of production years for the TTR125, TT-R125E, and TT-R125LWE models, usually from the early 2000s through to recent models, but specific year coverage should be confirmed by the seller.

Page Count:

Exact page count varies based on the specific edition but is typically between 300-500 pages for a comprehensive service manual with a parts catalog.

📖 Manual Coverage

Systems Covered:

Engine (internal components, cooling, lubrication, fuel system, ignition system), Chassis (frame, suspension, wheels, tires, steering, brakes), Electrical System (lighting, charging system, ignition, switches), Drivetrain (transmission, clutch, final drive), Bodywork and Fairings, Troubleshooting Guide.

Parts Catalog Coverage:

Includes exploded views of all major assemblies with part numbers, facilitating accurate part identification and ordering for repairs and replacements.

Procedures Included:

Routine maintenance (oil changes, filter replacements, chain adjustment), Engine disassembly and reassembly, Carburetor adjustment and cleaning, Suspension servicing, Brake system inspection and repair, Electrical diagnostics and component testing, Chassis alignment checks, Tire replacement, General troubleshooting and fault diagnosis.

Technical Depth:

Detailed technical procedures suitable for DIY mechanics and professional technicians. Includes specifications, torque values, diagnostic flowcharts, and exploded diagrams for component identification and assembly.

Troubleshooting Guides:

Includes detailed troubleshooting flowcharts and symptom-based diagnostics for common issues, helping users quickly identify and resolve problems.

📊 Manual Specifications

File Format:

PDF (Likely, for searchability and portability)

Print Quality:

High-resolution for clear diagrams and text (assumed for a quality workshop manual)

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

Manual Completeness:

Full Workshop Service Repair Manual and Parts Catalogue, offering end-to-end coverage for maintenance, repair, and parts identification.

⚙️ Engine Specifications

Engine Code:

Typically 5HP or similar designation for the 124cc SOHC engine.

Bore X Stroke:

Specifics vary by exact year/variant, but typically around 52.4 x 57.9 mm.

Compression Ratio:

Typically around 9.5:1 to 10.5:1, depending on the specific model variant and tuning.

Horsepower:

Approx. 9-10 HP at ~8000-9000 RPM (estimated, varies by model variant and tuning).

Torque:

Approx. 7-8 lb-ft at ~6000-7000 RPM (estimated, varies by model variant and tuning).

Engine Layout:

Single-cylinder, forward-inclined

Carburetor Type:

Mikuni VM series (e.g., VM20 or similar) for most TTR125 variants. TT-R125E typically features electric start and may have specific carburetor settings.

Fuel Type:

Unleaded gasoline (87 octane or higher recommended)

Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA.

Oil Capacity:

Approx. 1.0 - 1.2 Liters (including oil filter replacement).

Cooling System:

Air-cooled

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple-disc

Final Drive:

Chain drive (typically 520 pitch)

Gear Ratios:

Specific ratios vary by model year and variant, detailed in the manual. Standard ratios are optimized for trail riding performance.

📐 Dimensions

Length:

Approx. 1825 mm (71.9 in)

Width:

Approx. 790 mm (31.1 in)

Height:

Approx. 1060 mm (41.7 in)

Seat Height:

Approx. 805 mm (31.7 in) for standard models, LWE may be slightly higher due to longer travel suspension.

Dry Weight:

Approx. 96 kg (212 lbs) for electric start models, slightly less for kick-start only.

Fuel Capacity:

Approx. 6.5 Liters (1.7 US gal)

Wheelbase:

Approx. 1280 mm (50.4 in)

🛡️ Safety Features

Crash Test Ratings:

N/A (Motorcycles are not typically rated in the same manner as automobiles.)

Braking System:

Front: Hydraulic disc brake; Rear: Drum brake (most TTR125 models). Some higher-spec variants or aftermarket upgrades might feature disc rear brakes.

Suspension Front:

Telescopic fork, 33mm stanchions. TT-R125LWE features longer travel and potentially adjustable damping.

Suspension Rear:

Monocross with adjustable spring preload. TT-R125LWE features longer travel and potentially adjustable damping for improved off-road capability.

Lighting:

Headlight, taillight/stop light, front and rear reflectors as per regulations for off-road use.

💡 Technology Features

Infotainment System:

N/A (Basic trail bike, no digital infotainment system).

Driver Assistance Features:

N/A (No electronic rider aids like ABS, traction control, etc. are standard on these models).

Connectivity Options:

N/A (No standard connectivity features).

Ignition System:

CDI (Capacitor Discharge Ignition)

Starting System:

Kick start (standard on some models), Electric Start (TT-R125E, TT-R125LWE).

🔧 Maintenance

Engine Oil Change:

Every 3000 km or 6 months, whichever comes first. More frequent changes recommended for severe off-road use.

Air Filter Cleaning:

Every 1000 km or as needed based on operating conditions (dusty environments require more frequent cleaning/replacement).

Spark Plug Replacement:

Check every 5000 km, replace as needed. NGK CR9E or similar recommended.

Valve Clearance Check:

Every 10000 km. Specific clearance values are detailed in the manual.

Engine Oil Spec:

Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA.

Brake Fluid Spec:

DOT 3 or DOT 4 hydraulic brake fluid.

Chain Lubrication:

Lubricate chain regularly with dedicated motorcycle chain lubricant, especially after washing or riding in wet conditions.

Coolant Type:

N/A (Air-cooled engine)

Common Issues:

Carburetor performance can be sensitive to altitude and temperature changes, requiring occasional adjustment. Clutch engagement can become slightly grabby with age. Chain and sprocket wear is typical for off-road use and requires regular maintenance. Some users report rear shock absorber wear or leaks over time, especially with heavy use.

📚 Vehicle History

Brand Heritage:

Yamaha Motor Company, established in 1955, has a rich heritage in motorcycle manufacturing, known for performance, innovation, and reliability across various motorcycling disciplines.

Model Evolution:

The TTR125 series was introduced to fill the gap for an accessible, user-friendly, yet capable 125cc trail bike. Key evolutions included the introduction of electric start (E model), longer travel suspension and larger front wheel (LWE model) for enhanced off-road performance, and different braking configurations.

Production Years:

The TTR125 platform has been in production for many years, with variations and updates occurring throughout its lifecycle, typically from the early 2000s to the present, with specific availability varying by market.

Manufacturing Location:

Primarily manufactured in Japan and other Yamaha global facilities.

🏆 Awards & Recognition

Industry Awards:

While not typically receiving formal industry awards, the TTR125 series is widely recognized by riders and publications as a benchmark for reliable, user-friendly, and fun entry-level trail bikes.

Consumer Ratings:

Consistently receives positive consumer ratings for ease of use, reliability, and value for money in the trail bike segment.